package com.rui.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.rui.reggie.common.CustomException;
import com.rui.reggie.entity.Category;
import com.rui.reggie.entity.Dish;
import com.rui.reggie.entity.Setmeal;
import com.rui.reggie.mapper.CategoryMapper;
import com.rui.reggie.service.CategoryService;
import com.rui.reggie.service.DishService;
import com.rui.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author : [锐神NO.3]
 * @version : [v1.0]
 * @className : CategoryServiceImpl
 * @createTime : [2022/5/19 18:21]
 * @description : [描述该类的功能]
 */

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类, 删除之前需要进行判断
     * @param ids
     */
    @Override
    public void remove(Long ids) {
        //查询当前的分类是否关联了菜品， 如果已经关联，则抛出业务异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();

        //添加查询条件, 根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, ids);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        if(count1 > 0){
            //已经关联菜品， 抛出业务异常
            throw new CustomException("当前分类已经关联菜品， 不能删除");
        }

        //查询当前的分类是否关联了套餐， 如果已经关联，则抛出业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();

        //添加查询条件, 根据分类id进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId, ids);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if(count2 > 0){
            //已经关联套餐， 抛出业务异常
            throw new CustomException("当前分类已经关联套餐， 不能删除");
        }

        //正常删除当前的分类
        super.removeById(ids);
    }
}
